Communication diode driver circuit

Details Communication diode driver circuit Communication diode driver circuit

2005-03-20

2009-08-04

Vo, Tuyet (Department: 2821)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S090000, C345S102000, C345S211000, C345S212000, C315S247000, C315S18500S, C315S291000, C315S324000

Reexamination Certificate

active

07570235

ABSTRACT:
A Communication Diode Driver Circuit (CDDC) for selectively illuminating communication diodes (CDs) in response to incoming digital data pulses with a LED drive current ILED(t) close to a nominal LED drive current INtherefor in a steady state operation of the CDDC. The CDDC includes a driver unit for driving the LED drive current ILED(t), and a closed loop feedback unit for continuously monitoring the LED drive current ILED(t) for providing a variable shift voltage SV(t). The driver unit includes a shift amplifier for combining a pulsed analog data voltage ADV(t) corresponding to incoming digital data pulses, and the shift voltage SV(t).

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